I didn't see this posted yet, but apologize if it has already been. Looks like he's the mystery guest
from eonline:
Pitt: Cushion for "Friends" Pushin' by Mark Armstrong Nov 1, 2001, 2:00 PM PT
Brad Pitt is about to fatten up NBC's November sweeps schedule. Literally.
Adding more heft to Hollywood's current fascination with chunky drawers, the A-list actor donned a fat suit this week to tape a special guest appearance on Friends, set to air November 22 during the all-important sweeps period, E! Online's TV maven Wanda reports.
NBC confirms only that Pitt will appear alongside wife Jennifer Aniston and her Central Perk pals on an upcoming episode of the revitalized Thursday comedy. The installment, titled "The One with the Rumor," will feature Monica (Courteney Cox Arquette) running into an old high school pal (Pitt) who once was fatter than she was, but has since shed the pounds and grown into a slim studmuffin.
She then invites him to Thanksgiving dinner, and as fate (or the writers) would have it, Pitt's character isn't a fan of Rachel (Aniston).
According to Wanda, a flashback scene forced Pitt to strap on a fat suit, making him just the latest star to pack on the latex love handles for a role. Cox Arquette, Gwyneth Paltrow (in her new Farrelly Brothers flick Shallow Hal), Julia Roberts and Martin Short, among others, have all gone chubby for recent gigs.
As for Friends, the Pitt casting--along with an upcoming guest stint by Sean Penn--will no doubt give NBC more weight to throw around as the number-one comedy heads into November sweeps ahead of CBS' Survivor: Africa. Now in its eighth season, Friends has experienced a resurgence thanks in part to the "Rachel-is-preggers" storyline. The series has averaged a whopping 28.4 million viewers, up significantly from last season